330A Plaza Road North was designated #330 Plaza Road North in the census, as no unit letters were used.² The occupants of 330A Plaza Road North were
     in 1930: Paul G Wellenkamp²
     in 1931: John C Jackson¹
     in 1933: Christopher J Fee³
     in 1935: Charles M Donnelly⁴
     in 1937: Alfred A. Refert⁵
     in 1939: Carmine Furey⁶
     and in 1941: H. W. Symonds.⁷

Paul G Wellenkamp was born in 1900 in New York.² He married Jean D in 1923.² Paul G Wellenkamp appeared on the 1930 Census as the head of household at 330 Plaza Road North, with Jean D as wife, and their children David and Jeremy.² The monthly rent was $58.-.² He owned a radio in 1930.² Paul G Wellenkamp and Jean D Wellenkamp moved before 1931 from 330A Plaza Road North to 9 Burnham Place, and before 1933 to 15 Bancroft Place.^3,4

John C Jackson married Lucille W.¹ John C Jackson was a civil engineer in Jersey City.¹ John C Jackson moved before 1933 from 330A Plaza Road North to 11 Bancroft Place.³

Christopher J Fee married Katherine L.³ Christopher J Fee was a salesman.³ Christopher J Fee moved before 1935 to Albany, New York.⁴

Charles M Donnelly married Mattie R.⁴ Charles M Donnelly was a salesman.⁴

Carmine Furey moved before 1939 from 328A Plaza Road North to 330A Plaza Road North.⁶ He moved before 1941 away from Radburn, as there was no longer an entry in the directory.⁷